Mobile imaging barcode scanner

ABSTRACT

Performance and size improvements in indicia readers are disclosed. The improvements provide for the integration of a barcode image scanner in a size restricted mobile computer device, such as a slim mobile data terminal or a smart mobile phone, and provide for the ability for the indicia reader to read direct product marking (DPM) type of barcodes. The improvements include the incorporation of an illumination module or bar that can generate dark field and bright field illumination. The illumination module can be designed to match the front end of a smart mobile phone and maintain a low profile design. Symmetric arranged multi-field, multi-color illuminator with close-up corrective lens and near coaxial aimer optics provide illumination and aiming support for the DPM scanning. The improvements allow the indicia reader, assembled in a slim mobile data terminal, to read direct product marking (DPM) type of barcodes.

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims the benefit of Chinese Patent Applicationfor Invention No. 201610889181.7 for a Mobile Imaging Barcode Scannerfiled at the State Intellectual Property Office of the People's Republicof China on Oct. 12, 2016, which is hereby incorporated by reference inits entirety.

FIELD OF THE INVENTION

The present invention relates to the field of indicia readers, and morespecifically, to improvements in illumination capability of the indiciareader for a size restricted mobile computer device to allow reading ofdirect product marking (DPM) barcodes.

BACKGROUND

Generally speaking mobile imaging barcode scanner with limited scannermodule dimensions suffers from illumination related barcode scandifficulties. As the typical scanner illuminator has close proximity tothe imaging lens, strong specular reflection can contaminate the imageespecially for highly reflective barcode. Direct product marking (DPM)type of barcode with metallic or laminated material are commonly adoptedin the industry. For this kind of barcode application, mobile imagingbarcode scanners show poor performance as compared with traditionalimaging scanners. Dedicated DPM imaging scanner approaches, such as domeshape illuminator and ring shape dark field illuminator, cannot bedirectly applied to the mobile imaging barcode scanner due to the spacerequirement.

With the introduction of slim mobile data terminal types of barcodescanners there is a need to provide DPM barcode scanning solution forthe front end mount imaging scanner module.

SUMMARY

Accordingly, in one aspect, the present invention embraces performanceand size improvements in indicia readers that provide for theintegration of a mobile image scanner in a size restricted mobilecomputer device, such as a slim mobile data terminal or a smart mobilephone, and provide for the ability for the indicia reader to read directproduct marking (DPM) type of barcodes. The improvements include theincorporation of an illumination module or bar that can generate darkfield and bright field illumination. The illumination module can bedesigned to match the front end of a smart mobile phone and maintain alow profile design. Symmetric arranged multi-field, multi-colorilluminator with close-up corrective lens and near coaxial aimer opticsprovide illumination and aiming support for the DPM scanning. Theimprovements allow the indicia reader, assembled in a slim mobile dataterminal, to read direct product marking (DPM) type of barcodes.

In an exemplary embodiment, an indicia-reading apparatus (e.g., anindicia-reading module) can comprise an illumination module, thatprovides dark field illumination and bright field illumination, and animage scanner module. The illumination module is proximate to the imagescanner module and integrated in a mobile computer device. Theilluminated module can be mounted to the image scanner module.

The illumination module can comprise a first and a second dark fieldmulti-color LED (e.g., a tri-color LED) and a first and second brightfield multi-color LED (e.g., a tri-color LED); a first and a second enddark field light block; a close-up corrective lens; an first and seconddiffuser. The first dark field multi-color LED and the first end darkfield light block are proximate to one end of the illumination module,and the second dark field multi-color LED and the second end dark fieldlight block are proximate to another end of the illumination module.

The first and the second bright field multi-color LED are each: 1)proximate to a center of the illumination module and adjacent to aclose-up corrective lens that is positioned in the center of theillumination module, and 2) proximate to a diffuser that diffuses lightemitted by the first and the second bright field multi-color LED.

A first and a second dark field multi-color LED (e.g., a tri-color LED)and the first and the second dark field multi-color LED (e.g., atri-color LED) can provide a high incident angle light for the darkfield illumination to prevent specular reflection entering an imaginglens field of view. The first and second bright field multi-color LEDand the first and second diffuser provide a low incident angle lightwith large area diffuser to minimized specular reflection disturbance ina bright field illumination.

The close-up corrective lens can provide imaging for near range reading.The illumination module can further comprise two aimer mirrors inproximity to the close-up corrective lens to provide a near-coaxialaimer for providing code alignment. The dark field multi-color LED andthe bright field multi-color LED can be programmable to achieve the bestcontrast with the best illumination spectrum for specific object.

The first dark field multi-color LED and the first bright fieldmulti-color LED are mounted on a first LED module, and the second darkfield multi-color LED and the second bright field multi-color LED can bemounted on a second LED module, and wherein, the first LED module can bemounted on one side of the illumination module and the second LED modulecan be mounted on an other side of the illumination module, with theclose-up corrective lens positioned between the first and second LEDmodule.

In another exemplary embodiment, an illumination module can comprise afirst and a second dark field multi-color LED for illuminating darkfields; a first and a second end dark field light blocks. The first andthe second dark field multi-color LED provide high incidence angle darkfield illumination to prevent specular reflection entering an imaginglens field of view. The first and the second end dark field light blockreduce illumination and reflection in the illumination module. Theillumination and reflections can be unwanted illumination andreflections.

The illumination module can further comprise a first and a second brightfield multi-color LED (e.g., tri-color LEDs) for illuminating brightfields; a first and second diffuser that are positioned to diffuse thelight emitted from the first and the second bright field multi-colorLED, respectively; and a close-up corrective lens that is positioned inthe center of illumination module, between the first and the secondbright field multi-color LED. The first and the second bright fieldmulti-color LED, provide a low incident angle light and the first andthe second diffuser to minimized specular reflection disturbance in abright field illumination. That is, the first and second diffuserdiffuses the bright field illumination.

The illumination module can further comprise two aimer mirrors inproximity to the close-up corrective lens to provide a near-coaxialaimer for providing code alignment. The illumination module is proximateto an image scanner module. The illumination module and image scannermodule are integrated in a smart mobile phone. Imaging scanning includesscanning direct product marking (DPM) type barcodes.

In yet another exemplary embodiment, a mobile data terminal can comprisean illumination module that provides dark field illumination and brightfield illumination; an image scanner module, and a smart mobile phone.The illumination module can be proximate to the image scanner module andcan be integrated in a smart mobile phone. The integration of theillumination module and the image scanner module supports thin mobilephone edge mount applications

The illumination module can comprise: a clear bezel to mechanicallysupport the components as well as optically support illumination, aimerand lens functions, two multi-color LEDs (e.g., tri-color LEDs) thatprovide edge illumination sources for dark field illumination, twomulti-color LEDs (e.g., tri-color LEDs) that provide front illuminationsources for bright field illumination, two light diffuser to improveuniformity of the front illumination, two aimer fold mirrors to redirectan aimer beam, and a corrective imaging lens for close-up reading.

The foregoing illustrative summary, as well as other exemplaryobjectives and/or advantages of the invention, and the manner in whichthe same are accomplished, are further explained within the followingdetailed description and its accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an exemplary embodiment of an image scanner module.

FIG. 2 illustrates an exemplary embodiment of an illumination module.

FIG. 3 illustrates an exemplary embodiment of an indicia-reading modulecomprising the integration of the image scanner module and theillumination module.

FIG. 4 illustrates an exemplary embodiment of the indicia-reading moduleintegrated in a case of a slim mobile data terminal or smart mobilephone.

FIG. 5 illustrates an exemplary embodiment of a horizontal and verticalview of the illumination module.

FIG. 6 illustrates an exemplary embodiment of a partially disassembledview of the illumination module.

FIG. 7A illustrates dark field and bright field illumination.

FIG. 7B illustrates an exemplary embodiment of the dark field and brightfield illumination of the indicia-reading module.

FIG. 8 illustrates an improvement in aiming accuracy provided by anexemplary embodiment of near-coaxial aimer beam fold mirrors inproximity to a close-up corrective lens.

DETAILED DESCRIPTION

Accordingly, in one aspect, the present invention embraces improvementsin indicia readers that 1) provide for the integration of a mobile imagescanner in a size restricted mobile computer device, such as a slimmobile data terminal or a smart mobile phone, and 2) provide for theability for the indicia reader to read direct product marking (DPM) typeof barcodes. The improvements include the incorporation of anillumination module or bar that can generate dark field and bright fieldillumination. The illumination module can be designed to match the frontend of a smart mobile phone and maintain a low profile design. Symmetricarranged multi-field, multi-color illuminator with close-up correctivelens and near coaxial aimer optics provide illumination and aimingsupport for the DPM scanning. The improvements allow the indicia reader,assembled in a slim mobile data terminal, to read direct product marking(DPM) type of barcodes.

As previously discussed, the typical scanner module illuminator, havingclose proximity to an imaging lens, can generate a strong specularreflection that can contaminate the image especially for highlyreflective barcode such as direct product marking (DPM) type of barcodewith metallic or laminated material. For this kind of barcodeapplication, typical mobile imaging barcode scanners show poorperformance than traditional imaging scanners. Dedicated DPM imagingscanner approaches cannot be directly applied to the mobile imagingbarcode scanner due to the space requirement.

A barcode reader (or barcode scanner) can be an electronic device thatcan read and output the data of a printed barcodes to a computer. It caninclude of a light source, a lens, and a light sensor translatingoptical impulses into electrical pulses. Barcode readers can containdecoder circuitry that analyzes the barcode's image data provided by thesensor and sends the barcode's content to the scanner's output port.

A barcode can be used to encode information in a visual pattern readableby a machine. Barcodes can be used for a variety of reasons includingtracking products, prices, and stock levels for centralized recording ina computer software system. There are two types of barcodes—linear and2D.

Most barcode scanners can include three different parts: theillumination system, the sensor, and the decoder. In general, a barcodescanner “scans” black and white elements of a barcode by illuminatingthe code with a light, which is then converted into matching text. Morespecifically, the sensor in the barcode scanner can detect the reflectedlight from the illumination system and generate a sensor streamreflecting the captured image of the barcode. The sensor stream is sentto the decoder. The decoder processes the frames of the sensor stream,validates the barcode, and coverts it into text. This converted text canbe delivered by the scanner to a computer software system holding adatabase of the maker, cost, and quantity of products sold.

Direct Part Marking (DPM)

DPM barcode scanners and mobile computers are equipped with imagerscapable of reading barcodes that are etched or imprinted directly intothe surface of materials such as plastic and metal.

DPM tags are in essence Datamatrix (or QR) symbols directly marked ontoa substrate (metal, rubber, glass, etc.). There are many markingtechnologies to choose from (e.g. mechanical drilling/hammering/laseretching/chemical etching/sand-blasting/mold casting/stenciling etc.)depending on substrate type, cost, and the level of durability that canbe desired. Unlike paper-based barcodes (i.e. printed on plain paper andusually printed with black ink/thermal on white backgrounds) DPMbarcodes can be tricky to scan, for several reasons includingreflectance from the substrate and lack of contrast between the actualmarks and the said substrate. Often times these marks can even appearcompletely “washed-out” to the casual observer. Another peculiarity ofDPM barcodes is that the barcode can be made of an assortment of dotswhich can be clearly non-contiguous with each other, or be overlapped tosome degree; these marks are usually referred to as “dot-peen” when madeof recessed circular dots.

As defined herein, a slim mobile data terminal is a mobile imagingbarcode scanner that has the approximate shape of a slim smart mobilephone. With the improvements discussed herein, the slim mobile dataterminal can provide DPM barcode scanning. The slim mobile data terminalcan include an illumination module or bar integrated with a front endmount imaging scanner module. The illumination bar can be mounted to fitinto a thin mobile phone edge mount application. The illumination barmatches the profile of the front of the smart mobile phone and providesa number of illumination incident angle options. The illumination modulecan effectively replace existing front enclosure wall of the smartmobile phone assembly structure inasmuch as the width and height of theillumination bar can be the same as the slim mobile data terminal

The dimensions of smart mobile phones in the market place can range asfollows: edge thickness from approximately 5 mm to 8 mm, and widths fromapproximately 58 mm to 77 mm. Smart mobile phone with dimension in thisrange can support thin mobile phone edge mount application, and may bereferred to as slim mobile data terminal. The present invention can beimplemented in smart mobile phones with the aforementioned range ofdimensions. However, the application of the present invention is notlimited to phones/terminals with the aforementioned range of dimensions.

The width of the illumination module assembly can comprise twoillumination sources positioned at the end of the illumination modulethat can provide high incident angle light for dark field illuminationto prevent specular reflection entering the imaging lens field of view.In the middle portion of the illumination module there can be anothertwo illumination sources that can provide low incident angle light thatis diffused with large area diffuser to minimized specular reflectiondisturbance in the bright field illumination.

Further improvements to the slim mobile data terminal can be achieved byadding a close-up corrective lens to the illumination module to reducethe best focus object distance. The aimer pattern beam for visualalignment can also be bent very close to the imaging lens axis tominimize the off-set between aimer pattern the true effective field ofview.

Other further improvements include some additional light treatments toeliminate stray light by adding light blocks to reduce unwantedillumination and reflection in the illumination module.

The illumination module can be designed to match the front end of asmart mobile phone and keep the low profile design. Symmetric arrangedmulti-field, multi-color illuminator with close-up corrective lens andnear coaxial aimer optics provide illumination and aiming support forthe DPM scanning.

The illumination module can include a clear polycarbonate bezel tomechanically support the components as well as optically supportillumination, aimer and lens functions, 2 PCB's with 4 tri-color LED'sthat provide edge and front illumination sources, 2 light diffuser toimprove uniformity of the front illumination, a pair of aimer foldmirrors to redirect the aimer beam, and the corrective imaging lens forclose up reading.

In summary, the illumination module can provide the following:

1. Two end high incidence light sources for dark field illuminationwithout any specular reflections.

2. Two area diffused front light source for bright field illuminationwith low specular reflections.

3. The dark field illumination and bright field illumination can beprovided by programmable tri-color light source for the best contrast ofthe image. The tri-color LEDS can be individually activated to supportvarious applications and options with illumination direction andspectrum selection.

4. Via a close up corrective imaging lens, an optical correction canprovide the best focus distance for a small size DPM reading.

5. A pair of aimer fold mirrors that redirects the aimer beam so that itis close to the imagine lens line of sight, in order to minimize theaiming error of the small size DPM code.

In an exemplary embodiment, FIG. 1 illustrates image scanner module 100.Image scanner module 100 can be referred to as a front-end mount imagingscanner module.

In an exemplary embodiment, FIG. 2 illustrates illumination module 200.Illumination module 200 can be referred to an illumination bar based onthe shape of illumination module 200

In an exemplary embodiment, FIG. 3 illustrates indicia-reading module300 comprising the integration of the image scanner module 100 and theillumination module 200.

In an exemplary embodiment, FIG. 4 illustrates a slim mobile dataterminal 400 comprising indicia-reading module 404 integrated in thecase 402 of the slim mobile data terminal 400. Case 402 can have a thinmobile phone edge mount structure. As illustrated, the front of theindicia-reading module 404 fits into the front of the slim mobile dataterminal 400. Slim mobile data terminal 400 can support DPM barcodescanning.

FIG. 5 illustrates a horizontal and vertical view 500 of illuminationmodule 200. FIG. 5 illustrates: a first and second LED module 502 and503, respectively; a slim imager lens bore fitting (boss) 504; a firstand second LED for end dark light illumination, 506 and 507,respectively; a first and second color LED for front bright lightillumination, 508 and 509, respectively; a close-up corrective lens 510;a first and second near-coaxial aimer beam fold mirrors, 512 and 514,respectively; a first and second end dark field light block, 516 and517, respectively; a first and second diffuser, 518 and 519,respectively.

The close-up corrective lens 510 is an imaging lens. The slim imagerlens bore fitting 504 is positioned with precise alignment. Theplurality of LEDs can be tri-color LEDs. Tri-color LEDs can beprogrammable and can provide improved contrast compared with traditionalmobile scanners. The LED modules can be circuit boards.

In an exemplary embodiment, FIG. 6 illustrates a partially disassembledview 600 of the illumination module 200. FIG. 6 illustrates: a first andsecond LED module, 602 and 603, respectively; two near-coaxial aimerbeam fold mirrors, 604; a first and second end dark field light block,606 and 607, respectively; a close-up corrective lens 608; a first andsecond diffuser, 610 and 611, respectively. The close-up corrective lens608 can provide for near range reading. The illumination module cancomprise an optically clear bezel 612. The component described hereincan fit into the optically clear bezel 612.

Bright field illumination is commonly used in optics. In this mode,light directly striking the surface is reflected based on the sample'scomposition and topography.

Dark field illumination is a tool for viewing particles, edges, or otherchanges occurring on a sample's surface. With this process, the centerof the light cone can be blocked allowing only light scattering alongthe surface at a high incident angle to illuminate the field of view.

FIG. 7A, embodiment 700, illustrates the relationships between a darkfield and a bright field. Light reflections are based on the principlethat the angle of incidence equals the angle of reflection. FIG. 7Aillustrates dark field that is generated by dark field lights in thegrey areas, and bright field that is generated by bright field lights inthe white areas. When imaging from a mirrored surface, the presence oflight in bright field on a shiny surface will be viewed from camera. Thepresence of lighting in dark field will not be viewed from camera.

As shown in FIG. 7A, a bright field light source emits beams of lightthat can have a low incident angle relative to the field of view. Asillustrated, the field of view is a mirrored surface. The subsequentreflection generates a bright field that is viewed by the camera.

A dark field light source emits beams of light that can have a highincident angle relative to the field of view. The subsequent reflectiondoes not appear in the bright field area. Rather, the dark field lightsource can generate dark fields.

The collection of light sources having a low incident angle relative tothe field of view and light sources having a high incident anglerelative to the field of view a “W” in illumination geometry, asillustrated in FIG. 7A. At a critical incident angle relative to thefield of view, a border between the dark field and bright field iscreated. The areas that are outside of the “W” are a dark field, and theareas that are inside the “W” are a bright field.

Effective application of dark field lighting relies on the fact thatmuch of the light incident on a mirrored surface in the field of view,that would otherwise flood the scene as a hot spot glare, is reflectedaway from, rather than toward a close-up corrective lens. The relativelysmall amount of light that is reflected back into the camera is whathappens to catch an edge of a small feature on the surface, satisfyingthe “angle of reflection equals the angle of incidence” equation.

In an exemplary embodiment, FIG. 7B illustrates dark field and brightfield illumination of indicia-reading module 750. Indicia-reading module750 can comprise image scanner module 760 and illumination module 762.LED 752 can be the source of the dark field illumination. LED 753 can bethe source of the bright field illumination. End dark field light block755 can eliminate undesired illumination and reflection in theillumination module. The diffuser 754 diffuses the light from LED 753.The collective pattern resulting from the dark field illumination andthe bright field illumination is illustrated by the dark field boundary756. The result can be distinctive areas of dark field and bright fieldillumination.

In an exemplary embodiment, FIG. 8 illustrates improvement in aimingaccuracy provided by an exemplary embodiment of two near-coaxial aimerbeam fold mirrors in proximity to a close-up corrective lens. FIG. 8,aimer pattern 802 illustrates an aimer pattern that is not in the centerof the image field of view. The slim imager aimer can have an off-setthat can create alignment errors, causing scanning errors. Thenear-coaxial aimer beam fold mirrors can effectively create a periscope.Accordingly, the aimer pattern can be re-directed to provide betteralignment, per FIG. 8, aimer pattern 804. The close-up corrective lens608 provides further improvement by shifting the best focus distancecloser to the image.

The illumination module 200 can provide:

-   -   Two-end high incidence angle dark field illumination    -   Two-area diffused front bright field illumination    -   Close-up corrective lens for near range reading    -   Near-coaxial aimer for better small code alignment    -   Programmable tri-color illumination for the best contrast    -   [may use this language for claim 20, or delete]

To supplement the present disclosure, this application incorporatesentirely by reference the following commonly assigned patents, patentapplication publications, and patent applications:

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In the specification and/or figures, typical embodiments of theinvention have been disclosed. The present invention is not limited tosuch exemplary embodiments. The use of the term “and/or” includes anyand all combinations of one or more of the associated listed items. Thefigures are schematic representations and so are not necessarily drawnto scale. Unless otherwise noted, specific terms have been used in ageneric and descriptive sense and not for purposes of limitation.

The invention claimed is:
 1. An indicia-reading apparatus, comprising:an illumination module that provides dark field illumination and brightfield illumination; and an image scanner module; wherein, theillumination module comprises: a first and a second dark fieldmulti-color LED and a first and second bright field multi-color LED; anda close-up corrective lens, the first dark field multi-color LED and thefirst bright field multi-color LED mounted on a first LED module, andthe second dark field multi-color LED and the second bright fieldmulti-color LED mounted on a second LED module, and wherein, the firstLED module is mounted on one side of the illumination module and thesecond LED module is mounted on an other side of the illuminationmodule, with the close-up corrective lens positioned between the firstand second LED module, and wherein, the illumination module is proximateto the image scanner module and they are integrated in a mobile computerdevice.
 2. The indicia-reading apparatus according to claim 1, wherein,the illumination module further comprises: a first and a second end darkfield light block; and a first and second diffuser.
 3. Theindicia-reading apparatus according to claim 2, wherein, the first darkfield multi-color LED and the first end dark field light block areproximate to one end of the illumination module, and the second darkfield multi-color LED and the second end dark field light block areproximate to another end of the illumination module.
 4. Theindicia-reading apparatus according to claim 2, wherein, the first andsecond bright field multi-color LEDs are each: proximate to a center ofthe illumination module and adjacent to the close-up corrective lensthat is positioned in the center of the illumination module, andproximate to the first and second diffuser that diffuse light emitted bythe first and the second bright field multi-color LED.
 5. Theindicia-reading apparatus according to claim 1, wherein the first andthe second dark field multi-color LED provide a high incident anglelight for the dark field illumination.
 6. The indicia-reading apparatusaccording to claim 2, wherein the first and second bright fieldmulti-color LEDs provide a low incident angle light and the first andsecond diffuser diffuses the bright field illumination.
 7. Theindicia-reading apparatus according to claim 1, wherein the close-upcorrective lens provides imaging for near range reading.
 8. Theindicia-reading apparatus according to claim 1, wherein the illuminationmodule comprises two aimer fold mirrors in proximity to the close-upcorrective lens.
 9. The indicia-reading apparatus according to claim 1,wherein the dark field multi-color LEDs and the bright field multi-colorLEDs are programmable.
 10. The indicia-reading apparatus according toclaim 1, wherein, the mobile computer device is a smart mobile phone.11. The indicia-reading apparatus according to claim 1, wherein, theindicia-reading apparatus reads direct product marking (DPM) typebarcodes.
 12. An illumination module, comprising: a first and a seconddark field multi-color LED for illuminating dark fields; and a first anda second end dark field light block; a first and a second bright fieldmulti-color LED for illuminating bright fields; a close-up correctivelens; wherein, the first and the second dark field multi-color LEDprovide high incidence angle dark field illumination, and wherein, thefirst and the second end dark field light block reduces illumination andreflection in the illumination module, wherein the first dark fieldmulti-color LED and the first bright field multi-color LED mounted on afirst LED module, and the second dark field multi-color LED and thesecond bright field multi-color LED mounted on a second LED module, andwherein, the first LED module is mounted on one side of the illuminationmodule and the second LED module is mounted on another side of theillumination module, with the close-up corrective lens positionedbetween the first and second LED modules, and wherein, the first darkfield multi-color LED and the first end dark field light block areproximate to one end of the illumination module, and the second darkfield multi-color LED and the second end dark field light block areproximate to another end of the illumination module.
 13. Theillumination module according to claim 12, further comprising: a firstand second diffuser that are positioned to diffuse light emitted fromthe first and the second bright field multi-color LED, respectively theclose-up corrective lens positioned in a center of the illuminationmodule, between the first and the second bright field multi-color LED,wherein, the first and the second bright field multi-color LEDs providea low incident angle light and the first and the second diffuser diffusethe bright field illumination.
 14. The illumination module according toclaim 13, comprising two aimer mirrors in proximity to the close-upcorrective lens.
 15. The illumination module according to claim 12,wherein, the illumination module is proximate to an image scanner moduleand the illumination module and image scanner module are integrated in asmart mobile phone.
 16. The illumination module according to claim 12,wherein, imaging scanning includes scanning direct product marking (DPM)type barcodes.
 17. A mobile data terminal, comprising: an illuminationmodule that provides dark field illumination and bright fieldillumination; an image scanner module; and a smart mobile phone,wherein, the illumination module comprises: a first and a second darkfield multi-color LED to provide edge illumination sources for darkfield illumination; a first and second bright field multi-color LED toprovide front illumination sources for bright field illumination, aclose-up corrective lens, the first dark field multi-color LED and thefirst bright field multi-color LED mounted on a first LED module, andthe second dark field multi-color LED and the second bright fieldmulti-color LED mounted on a second LED module, and wherein, the firstLED module is mounted on one side of the illumination module and thesecond LED module is mounted on an other side of the illuminationmodule, with the close-up corrective lens positioned between the firstand second LED module, and wherein, the illumination module is proximateto the image scanner module and they are integrated in the smart mobilephone.
 18. The mobile data terminal according to claim 17, wherein, theintegration of the illumination module and the image scanner modulesupports thin mobile phone edge mount applications.
 19. The mobile dataterminal according to claim 17, wherein, the illumination module furthercomprises: a clear bezel to mechanically support components as well asoptically support illumination, aimer, and lens functions, two lightdiffuser to improve uniformity of the front illumination, and two aimerfold mirrors to redirect an aimer beam.